witness: lock order reversal: 1st 0xfffffd806c8ecf10 vmmaplk (&map->lock) 2nd 0xfffffd806deb43d0 inode (&ip->i_lock) lock order [1] vmmaplk (&map->lock) -> [2] inode (&ip->i_lock) #0 rw_enter+0x122 #1 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #2 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #3 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #4 vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 #5 vndstrategy+0x4ff sys/dev/vnd.c:342 #6 physio+0x2f6 sys/kern/kern_physio.c:162 #7 spec_read+0x155 sys/kern/spec_vnops.c:215 #8 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #9 vn_read+0x17b sys/kern/vfs_vnops.c:369 #10 dofilereadv+0x230 sys/kern/sys_generic.c:252 #11 sys_readv+0xd8 sys/kern/sys_generic.c:199 #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 lock order [2] inode (&ip->i_lock) -> [1] vmmaplk (&map->lock) #0 rw_enter_read+0xab sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819 #2 uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #4 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 #5 kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x57 #8 ffs_read+0x422 sys/ufs/ffs/ffs_vnops.c:254 #9 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #10 vn_rdwr+0x15b #11 vmcmd_map_readvn+0x142 sys/kern/exec_subr.c:249 #12 exec_process_vmcmds+0xfb sys/kern/exec_subr.c:139 #13 sys_execve+0xbe4 sys/kern/kern_exec.c:468 #14 start_init+0x3c6 sys/kern/init_main.c:714 #15 proc_trampoline+0x10 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806deb43d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806deb43c0,1) at rw_enter+0x122 rrw_enter(fffffd806deb43c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd8067490898,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8067490898,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd8067490898,ffff800011a26480,c,0,1,e2502b8c3c87b742,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8066ff5d50) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8210a140,2902,8000,ffffffff81005cc0,ffff80003723dcc0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003723dab0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806dd76eb8,ffff80003723dcc0,0,fffffd807f7d3410) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bd84d30,ffff80003723dcc0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000372871f0,4,ffff80003723dcc0,0,ffff80003723dd80) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000372871f0,ffff80003723de30,ffff80003723dd80) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003723de30) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003723de30) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7969791d970, count: -16 ddb{1}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff80003723d570 rbx 0xfffffd80042c82b8 rdx 0xffff8000000451c0 rcx 0xffff8000372871f0 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff80003723d450 r9 0x8080808080808080 r10 0x9cdfcae51494ae68 r11 0x7ee488826befc1c9 r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81ac00e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003723d560 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=515154 pid=35376 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037286ce0,0xffff800037286f78 process=0xffff8000ffff56a8 user=0xffff800037238000, vmspace=0xfffffd806c8ece18 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61133 248923 92637 0 2 0 syz-executor 35376 443685 88277 0 7 0 syz-executor *35376 515154 88277 0 7 0x4000000 syz-executor 4535 503842 88762 0 2 0 syz-executor 4535 365432 88762 0 2 0x4000000 syz-executor 11453 340533 26077 0 2 0 syz-executor 11453 138224 26077 0 3 0x4000080 fsleep syz-executor 88277 146316 86331 0 3 0x82 nanoslp syz-executor 16590 322576 0 0 3 0x14280 nfsidl nfsio 90323 410517 0 0 3 0x14280 nfsidl nfsio 93694 367522 0 0 3 0x14280 nfsidl nfsio 30688 103002 0 0 3 0x14280 nfsidl nfsio 21976 210927 0 0 3 0x14280 nfsidl nfsio 46577 257408 0 0 3 0x14280 nfsidl nfsio 712 209086 0 0 3 0x14280 nfsidl nfsio 37196 120797 0 0 3 0x14280 nfsidl nfsio 86576 305197 0 0 3 0x14280 nfsidl nfsio 30770 103214 0 0 3 0x14280 nfsidl nfsio 71985 253996 0 0 3 0x14280 nfsidl nfsio 41844 280197 0 0 3 0x14280 nfsidl nfsio 9494 457370 0 0 3 0x14280 nfsidl nfsio 10055 465115 0 0 3 0x14280 nfsidl nfsio 47365 288954 0 0 3 0x14280 nfsidl nfsio 42985 218481 0 0 3 0x14280 nfsidl nfsio 10435 324574 0 0 3 0x14280 nfsidl nfsio 97420 394690 0 0 3 0x14280 nfsidl nfsio 63261 483240 0 0 3 0x14280 nfsidl nfsio 56622 180445 0 0 3 0x14280 nfsidl nfsio 4976 380536 1 0 3 0x100083 ttyin getty 99548 476036 0 0 3 0x14200 bored sosplice 44709 232014 86331 0 3 0x82 wait syz-executor 26077 68109 86331 0 3 0x82 nanoslp syz-executor 97626 259847 86331 0 3 0x82 wait syz-executor 92637 342125 86331 0 3 0x82 nanoslp syz-executor 70249 480414 86331 0 3 0x2 biowait syz-executor 88762 524150 86331 0 3 0x82 nanoslp syz-executor 86331 427364 79285 0 2 0x2 syz-executor 79285 230741 6684 0 3 0x10008a sigsusp ksh 6684 161628 16439 0 3 0x98 kqread sshd-session 16439 344986 60424 0 3 0x92 kqread sshd-session 60424 227862 1 0 3 0x88 kqread sshd 16899 435481 85012 74 3 0x1100092 bpf pflogd 85012 374990 1 0 3 0x80 sbwait pflogd 61425 509861 4028 73 3 0x1100090 kqread syslogd 4028 206889 1 0 3 0x100082 sbwait syslogd 38612 291073 1 0 3 0x100080 kqread resolvd 74151 277426 5148 77 3 0x100092 kqread dhcpleased 28629 229054 5148 77 3 0x100092 kqread dhcpleased 5148 438631 1 0 3 0x80 kqread dhcpleased 14936 111847 0 0 3 0x14200 bored smr 36948 490409 0 0 2 0x14200 zerothread 1675 99929 0 0 3 0x14200 aiodoned aiodoned 48932 180365 0 0 3 0x14200 syncer update 62058 468592 0 0 3 0x14200 cleaner cleaner 89170 422666 0 0 3 0x14200 reaper reaper 17683 295948 0 0 3 0x14200 pgdaemon pagedaemon 8076 103469 0 0 3 0x14200 bored viomb 84424 293839 0 0 3 0x40014200 acpi0 acpi0 93606 184751 0 0 3 0x40014200 idle1 6289 302658 0 0 3 0x14200 bored softnet3 69056 496448 0 0 3 0x14200 bored softnet2 2966 118147 0 0 3 0x14200 bored softnet1 94455 298660 0 0 3 0x14200 bored softnet0 45349 20762 0 0 3 0x14200 bored systqmp 86588 344105 0 0 3 0x14200 bored systq 69319 279587 0 0 3 0x14200 tmoslp softclockmp 37278 204929 0 0 3 0x40014200 tmoslp softclock 99099 187776 0 0 3 0x40014200 idle0 1 131923 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 35376 (syz-executor) thread 0xffff8000372871f0 (515154) shared rwlock vmmaplk r = 0 (0xfffffd806c8ecf10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:172 #2 physio+0x277 sys/kern/kern_physio.c:139 #3 spec_read+0x155 sys/kern/spec_vnops.c:215 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_read+0x17b sys/kern/vfs_vnops.c:369 #6 dofilereadv+0x230 sys/kern/sys_generic.c:252 #7 sys_readv+0xd8 sys/kern/sys_generic.c:199 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835a0b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vn_read+0x56 sys/kern/vfs_vnops.c:351 #2 dofilereadv+0x230 sys/kern/sys_generic.c:252 #3 sys_readv+0xd8 sys/kern/sys_generic.c:199 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 70249 (syz-executor) thread 0xffff80002a03ecc0 (480414) exclusive rrwlock inode r = 0 (0xfffffd806deb7e68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd753d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 11188K 11512K 166960K 13071 0 pcb 17 14K 15K 166960K 164 0 rtable 159 5K 7K 166960K 489 0 pf 42 19K 22K 166960K 120 0 ifaddr 33 5K 7K 166960K 80 0 ifgroup 63 2K 2K 166960K 121 0 sysctl 4 1K 1K 166960K 4 0 counters 66 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1570 0 iov 0 0K 16K 166960K 92 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1497 94K 95K 166960K 2449 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 18K 166960K 33 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 235 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 15 53K 93K 166960K 1164 0 sigio 1 0K 0K 166960K 125 0 proc 72 91K 128K 166960K 715 0 subproc 91 5K 6K 166960K 120 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 150 0 in_multi 59 4K 7K 166960K 169 0 ether_multi 1 0K 0K 166960K 14 0 mrt 3 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 849 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 65K 86K 166960K 12572 0 UVM aobj 38 4K 4K 166960K 42 0 pinsyscall 40 80K 106K 166960K 2267 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 67 0 NDP 13 0K 2K 166960K 55 0 temp 68 6826K 6950K 166960K 46873 0 kqueue 13 20K 28K 166960K 169 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 121 0 118 2 1 1 2 0 8 0 rtentry 112 156 0 87 4 0 4 4 0 8 0 unpcb 144 851 0 833 3 2 1 3 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 403 0 399 13 12 1 8 0 8 0 arp 120 29 0 11 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 1286 0 1278 15 13 2 12 0 8 1 nd6 136 31 0 18 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 9 0 2 1 0 1 1 0 8 0 ppxss 1168 14 0 14 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 98 0 27 1 0 1 1 0 8 0 pfstkey 128 100 0 29 3 0 3 3 0 8 0 pfstate 376 98 0 28 7 0 7 7 0 8 0 pfrule 1344 34 0 22 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 644 0 352 29 2 27 29 0 8 5 art_table 32 646 0 352 4 0 4 4 0 8 0 art_node 16 154 0 93 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 1 0 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 229 0 219 1 0 1 1 0 8 0 shmpl 112 39 0 4 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3414 0 1913 95 0 95 95 0 8 0 ffsino 272 3414 0 1913 102 0 102 102 0 8 0 nchpl 144 5109 0 3415 64 1 63 64 0 8 0 uvmvnodes 80 4299 0 0 88 0 88 88 0 8 0 vnodes 216 4299 0 0 239 0 239 239 0 8 0 namei 1024 18550 0 18549 2 1 1 1 0 8 0 percpumem 16 68 0 21 1 0 1 1 0 8 0 kstatmem 264 68 0 42 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 15180 0 15179 12 9 3 8 1 8 2 plimitpl 152 250 0 233 1 0 1 1 0 8 0 sigapl 424 1493 0 1424 10 1 9 9 0 8 0 futexpl 64 16212 0 16211 1 0 1 1 0 8 0 knotepl 120 808 0 0 24 0 24 24 0 8 0 kqueuepl 216 428 0 419 9 6 3 5 0 8 2 pipepl 320 265 0 238 8 5 3 8 0 8 0 fdescpl 496 1444 0 1415 5 0 5 5 0 8 0 filepl 152 9835 0 9604 20 7 13 17 0 8 2 lockfpl 104 733 0 731 3 2 1 2 0 8 0 lockfspl 48 300 0 298 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 49 0 32 1 0 1 1 0 8 0 ucredpl 104 1398 0 1383 1 0 1 1 0 8 0 zombiepl 144 1427 0 1424 1 0 1 1 0 8 0 processpl 1160 1493 0 1424 7 1 6 6 0 8 0 procpl 648 3254 0 3182 8 0 8 8 0 8 0 srpgc 96 15 0 15 3 2 1 1 0 8 1 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 664 2284 0 2256 16 11 5 14 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 35 0 0 5 0 5 5 0 8 0 mtagpl 96 91 0 0 3 0 3 3 0 8 0 mbufpl 256 272 0 0 17 0 17 17 0 8 0 bufpl 280 4362 0 107 304 0 304 304 0 8 0 anonpl 24 244847 0 239105 66 4 62 62 0 185 20 amapchunkpl 152 41313 0 40745 40 4 36 36 0 158 9 amappl16 200 5834 0 5755 39 25 14 18 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 115 0 102 1 0 1 1 0 8 0 amappl13 176 42 0 41 2 1 1 1 0 8 0 amappl12 168 2133 0 2104 4 2 2 3 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 186 0 186 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 113 0 100 1 0 1 1 0 8 0 amappl6 120 202 0 200 1 0 1 1 0 8 0 amappl5 112 138 0 126 1 0 1 1 0 8 0 amappl4 104 329 0 309 1 0 1 1 0 8 0 amappl3 96 7503 0 7412 3 0 3 3 0 8 0 amappl2 88 1708 0 1622 3 0 3 3 0 8 1 amappl1 80 10640 0 10084 15 2 13 15 0 8 0 amappl 88 12117 0 11948 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 41 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1444 0 1415 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1444 0 1415 1 0 1 1 0 8 0 vmmpekpl 168 12881 0 12819 3 0 3 3 0 8 0 vmmpepl 168 94214 0 92383 102 3 99 99 0 357 11 vmsppl 448 1443 0 1415 6 2 4 5 0 8 0 rwobjpl 56 31356 0 26051 77 0 77 77 0 8 1 pdppl 4096 2895 0 2830 105 34 71 85 0 8 6 pvpl 32 17130 0 0 140 1 139 139 0 265 0 pmappl 248 1443 0 1415 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 418 0 68 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff834f2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff800035592400,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff800035592570,ffff800000079e00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 intr_handler(ffff8000355926d0,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7793faef53d0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806deb43d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806deb43c0,1) at rw_enter+0x122 rrw_enter(fffffd806deb43c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd8067490898,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd8067490898,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vn_rdwr(0,fffffd8067490898,ffff800011a26480,c,0,1,e2502b8c3c87b742,0,ffff800000b3e000,0) at vn_rdwr+0xd1 sys/kern/vfs_vnops.c:320 vndstrategy(fffffd8066ff5d50) at vndstrategy+0x4ff sys/dev/vnd.c:342 physio(ffffffff8210a140,2902,8000,ffffffff81005cc0,ffff80003723dcc0) at physio+0x2f6 sys/kern/kern_physio.c:162 spec_read(ffff80003723dab0) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd806dd76eb8,ffff80003723dcc0,0,fffffd807f7d3410) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806bd84d30,ffff80003723dcc0,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff8000372871f0,4,ffff80003723dcc0,0,ffff80003723dd80) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_readv(ffff8000372871f0,ffff80003723de30,ffff80003723dd80) at sys_readv+0xd8 sys/kern/sys_generic.c:199 syscall(ffff80003723de30) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff80003723de30) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7969791d970, count: -16